Nobody loves downtime or reboots -- especially not Suse. But the Linux engineers at Suse didn't just sit there and grind their teeth over forced reboots after a kernel patch; they went out and did something about it.
That something was Kgraft, a technology that allows live hotfixes to be applied to the Linux kernel without a reboot . Now Suse's decided to release that technology into the wild as an open source project, under the GPLv3 license.